Earlier quoted context omitted.
Most bread you get from a supermarket (even outside the US) is highly processed garbage, as are many common sandwich fillings (mayo, salami, margarine). The typical sandwich is probably up there with many of the other least healthy things you could eat, so yeah, ground up wheat with filling to make it taste good is probably fair.
Mayo is processed garbage?? Please explain. It’s whipped egg with lemon and oil, maybe some salt.
It has rapeseed oil, which to me seems dubious since it requires special processing to make it non-toxic.
It only has 5.1% eggs (according to the label).
It also has "flavorings", thickeners and coloring agents.
So yeah, it's nothing like the homemade mayo I make, which only has olive oil, a bunch of eggs, mustard, and indeed some salt. Mine doesn't need any sort of coloring and is thick enough.